Form and mold for radius curb sections



Feb. .4, 1930. J. N. RAUBER I FORM AND MOLD FOR RADIUS CURB SECTIONSFiled July 9; 1928' INVENTOR Bg/-N N ,QAUBER l ATTORNEY Patented Feb. 4,1930 I JOHN N. RA'UBER, OFiROCvI-IESTER, NEW YORK FORM AND MOLD FORRADIUS CURB SECTIONS V.Application led July 9, 1928. Serial No. 291,149.

This invention relates to forms for molding radius curbl sections andthe like.

In molding radius curb sections such .as

are used in forming the boundaries of a driveway, it has been customaryto erect the form or mold at the sides of the driveway in A vthe finalposition ofthe curb section and to rcast it in place. In such anarrangement it was necessary to trowel the upper surface of l V520 factthat in a wet mixture such as is used'for curb sections, the cementtends to settle to the bottom. Furthermore, the casting of the sectionin the position where it is to be used requires certain weatherconditions and even under thebest weather conditions the sections cannotbe cured to give the same degree of strength as when they are cast in afactory where temperature and moisture conditions are closely regulated.I have also discovered '30 that if there is a seam or joint in the formwhich permits water` to leak from the mix Y ture, there will developroughness'and weakness in the section` at that point.

n Y In accordance with the present invention it` is proposed to castradius curb sections 1n a factory where exact specifications of mixture,temperature, and curing, can be followed. A further feature of theinvention includes the y process of molding curb sections in invertedposition so that the portions of the section exposed to wear are ofdenser texture than the portions concealed when' in use, whereby it isunnecessary to employ a reenforcing Y metal strip on the surface of thesection ex- ,45 posed to the greatest amount of wear or shock. Anadditional feature of the invention is the construction of a knock-downform or mold yfor radiussections which is readily asse-mbled anddisassembled andy which has no seams f or joints at points correspondingto the exposed surface Iof the section, thus preventing weakness atthese points dueto water leaking from the mixture. l y

The invention will bestbe understood by reference to the drawing in4which Figure 1 is a perspective View of a single precast curbk section.Figure 2 is a plan view of the mold of this invention containing a curbsection of the type shownin Figure 1, in inverted position. Figure 3 isa sectional view taken on the line 3 3 of Figure 2 while Figure 1 is anend view of the mold. Figure 5 is aside elevation of one of the endplates of the mold and Figure 6 is a sectional view thereof taken on'the line 6-6 of Figure 5.' In Figure 1 there is shown a curved curbVsection generally designated 10 which is used in forming a drivewayfrom a street having afboundary curbing. The section 10vis substantiallyoblong in 'cross section having one corner cut off as shown at 11 whereythe section is exposed to the wear of vehicles. In

Yformer concrete curbing it has been customary to insert a reenforcingstrip at the rounded corner 12 to strengthen the curbing against vehiclewear. By the presentprocessin'which thecurb sections are cast ininverted position, as is best shown in .Figure 3, the top portion ofthesection 10 and especially the moldedcorner 12, are composed'of suchdense material that the reen'forcing strip becomes unnecessary. Thesection 10 in each -of its'ends has a notch 13 to receive hooks or othertools for lifting the sectionv into place.

`In addition these notches are filled with Inorplace `when the mortar orconcrete hardens.

The curb section 10 of Figure 1 is cast in a mold represented inFigures2-6. f This moldl consists of anarcuatesheet metal back plate 14eymounted on a frame of wood or other lsuitable material, the topportionoffthe frame being. designated 15, the vend members316, andthebottom member as 17. The bottom and front side of the mold is .formed asan arcuate unit structure or'lfront portionV so thaty thereemay be noseams in the exposed top or side of the curb section. This front portionof the mold or structure consists of an integral bottom portion 18having an arcuate shoulder extending throughout its length and aninclined portion 19 having a flange 20. This portion of the mold ispreferably formed of cast iron. or sheet metal a1- though anyarrangement may be employed in Which the inner surface of the mold Willform a smooth surface on the portion of the section Which is exposed toview when in use. The remaining front surface of this portion. of themold includes a plate 21 preferably of sheet material Which is mounted;on a frame of Wood or other suitable reenforcing v material which frameincludes' a top member .portions of the mold.

22,vertical end posts 23y and a bottom member 24. This frame may befastened. to the flange.

20 by bolts 25. Thev plates or end portion of the mold. shown in Figures5 and 6 arezgen-V placedy in the position shown in Figures 2 and 3 inWhich positionv they are clamped in fixed position by bolts 29. It Willthus be seen that the form or Inold of this invention is a knockdoWnstructure Which is 'readily stored in a minimum amount of space rand inWhich the inner surfaces-are of smooth material, readily accessible to aWorkman so that adhering portions of the previous curb section may bere.-

moved and the surface treated so that the concrete mixture does notadhere thereto. In this mold since the portions 18 and 19 are ofintegral structure, there are no seams or joints on the surface of thesection that is exposed v to vievvr WhenV it is in'use.v

IVhat I claim is:

1. In a formv for radius CurbsectiOnsand thelilre, an arcuate frontportion having integral horizontal and inclined 11p-right partscorresponding Y to exposed portions vof the clined parts, a flange onsaid inclined part, a vertical sheet metal part mounted on a reenforcingframe secured to said flange, an arcuate shoulder on said horizontalpart, a back plate consisting of sheet metal mounted on a reenforcingframe, detachable end plates, and means for. clamping .said end. platesbetWeensaid front plate and said back plate With the lower edge oftheback plate engaging said arcuate shoulder. n

Inwitness whereof, I hereunto subscribe my name June, 1.9.2.8..v

` JHN N. RAUBER.

section when in use, a vertical vpart 'secured to the upper edge of saidinclined part,.said horizont-al1 part being provided with any arcuateshoulder near one edge, and separate arcuate back plate andv end platesarranged Y to be heldY i-n ixed'relation with respect to, and' havingpartsin engagement with. the

horizontal partA of said front portion to provide a.- container from.which substantially noneof the ingredients ofthe cement mixture canescaparone edge of said arcuate yback plate-normally engaging saidvshoulder.

- 2;. Ina. formfor a `radius curb: section and the. like, an. arcuatefront portion of: cast metal: haring integral.. horizontal and .i11-

